Flexible handle connection for calculating machines



May 6, 1930.

" 0. D. JOHANTGEN FLEXIBLE HANDLE CONNECTIQN FOR CALCULATING MACHINES Filed Sept. 25 1922 3 Sheets-Sheet l May 6, 1930.

O. D. JOHANTGEN FLEXIBLE HANDLE CONNECTION FOR CALCULATING MACHINES 5 Sheets-Sh'eet 2 Filed Sept. 25 1922 1mm? 60?": Oak/@210. Ja/myen' May 6, 1930. o. D. JOHANTGEN 1,757,669

FLEXIBLE HANDLE CONNECTION FOR CALCULATING MACHINES Filed Sept. 25, 1922 5 Shets-Sheet 5' 122 waor: 8 OZL'Ve Q0. Jakamz 492% Patented May 6, 1930 UNITED STATES ,PATENT' OFFICE OLIVER D. JOHANTGEN, OF LAKE BLUFF, ILLINOIS, ASSIGNOR '10 VICTOR ADDING MACHINE (30., A. CORPORATION OF ILLINOIS FLEXIBLE HANDLE CONNECTION FOR CALCULATING Application filed September 25, 1922. Serial No. 550,385.

The invention relates to calculating m2 chines, and especially to those having a spring-returned actuating handle and a retarding cylinder limiting the speed of movement of the operative parts of the machine, regardless of the rate of forward movement of the handle.

Theobject of the invention is to provide an improved form of yielding power transmitting connection between the handle and the operative parts of the machine, ermitting the operativeparts thereof to lag behind the handle during its forward movement and preventing the return of the handle until the said operative parts have completed that part of their movement intended to be accomplished by the said forward movement of the handle.

In the accompanying drawings: Fig. 1 is a detail side elevation of a calculating machine embodying the features of improvement provided by the invention, the case or cover being removed and parts of the recording and accumulating mechanisms being omitted; Fig. 2 isa detail longitudinal sectional view taken on the line 2-2'of Fig. 5;

Fig. 3 is a detail side elevation, drawn to a larger scale, showing the parts connecting p the control shaft with the main shaft when 80 the handle has reached its extreme forward position, but with the corresponding movement of the operative parts only partially completed; Fig. 4 is a detail sectional view; i Fig. 5 is a plan view of some of the parts shown in Fig. 1;

Fig. 6 is a detail section taken on the same plane w th Fig. 2 as shown by line 22 on ig. 5, but viewed in the opposite direction; Fig. 7 is a perspective view of a two-arm pawl; and p Fig. 8 is a detail section taken through the control shaft, as viewed outwardly upon a disk which cooperates with one of the arms of the said pawl.

For the purpose of illustrating the inven tion, the improved mechanism is shown applied to. the so-called main shaft, as 10, and control shaft, as 1-1, of the listing machine I forming the subjectof Patent No. 1,336,840,

dated April 13, 1920. 'In the present case the actuating handle 12 is loosely mounted upon one retardin cylinder 13 is located at the remote side of t e'machine from the actuating handle and is operatively connected with-the control shaft, as through a crank disk 14, a

end of the main shaft 10, while the I link 15, and a bell-crank lever 16, the crank disk 14 being applied to the end of the control shaft, and the bell-crank lever 16 being pivotally mounted upon a fixed support and d1- rectly connected to the movable part of the retarding cylinder.

The present improvement also permits of the main shaft 10 and control shaft 11 being positively connected. Forthis purposeacrank disk 17, shown in detailin Fig. 8, is fixed upon the control shaft, and a link 18 connects thisdisk with a crank arm 19, fixed upon the main shaft, asby a pin 19 (Fig. 4). Thus, while thehandle 12 is applied to the main shaft, the handle does not directly actuate the main shaft, but this is accomplished through thecontrol shaft.

As shown, a collar 20 is rotatably mounted upon the end of the main shaft to receive the handle. This collar is'held against axial dislacement on the main shaft, as by a pin 21, which has threaded engagement with the'hub 22 of a crank disk 23, and extends through the collar and into a groove 21 formed in the shaft. It will thus be seen that the pin 21 also serves to rotatably connect the crank disk 23 with the collar 20. A screw cap 24, applied to the end of the collar 20 over the handle 12, servesto hold the handle against axial displacement on the collar, and when so rigid tongue and groove connection 25 1 Preferably another crank disk, as 26, is loosely mounted upon the main shaft 10 between the crank disk 23 andthe crank arm 19 (Fig. 4). As shown, the crank disk 23 and handle 12 have limited angular movement with respect to the crank disk 26. This movement is controlled by a spring 27, connecting held the handle and the .crank disk 23 have a the two crank disks 23 and 26,- and the movement is limited by the provision of a stud 28 (Fig. 6), mounted on crank disk 23 and prg;

the link 18 which in turn jecting inwardly therefrom between oppositely facing spaced shoulders 29 and 30, formed on the crank disk 26. The main spring, as 31, is applied to crank disk 26, being connected thereto by a link 31. v

Motion is transmitted to the control shaft 11 from the crank disk 26. For this purpose a link 32 positively connects crank disk 26' with a ratchet disk 33 mounted on the control shaft 11 in front of the crank disk 17. Ratchet disk 33 is loose on the control shaft 11, and is permitted a limited amount of angular movement thereon by having a pin and slot connection 34, 35, with the crank disk. Furthermore, a stout spring 36 reacts between the ratchet disk 33 and the crank disk 17, in the direction to retract the ratchet disk on the shaft.

The forward movement of the handle 12 is communicated to the control shaft 11.and main shaft 10 through spring 36, whereby the said two shafts, and the operative parts of the machine actuated therefrom, may lag behind the handle in accordance with the governing effect of the retarding c linder 13'" Upon release of the handle 12, after a full strokeforward, the parts are returned by the main spring 31, the return movement of the handle exceeding that permitted for the crank disk 26 and the said excess return movement of the handle being cushioned by the spring 27.

A full forward stroke of the handle at each operation is insured by providing a pawl, as 37 (Fig. 7) for coacting with the ratchet disk 33. However, to prevent return of the handle until the forward movement of the control shaft has been completed, the pawl 37 is preferably provided with a second arm, as 38, which rides on the rim of the crank disk 17. When this form of two-arm pawl is employed release of the ratchet disk 33 requires that both the ratchet disk and the crank disk 17 must pass forwardly beyond the corresponding arms of the pawl. Both arms of the pawl will then drop down behind the corresponding disks. During the return movement of the disks thepawl will be turned backwardly and will cooperate with the ratchet-disk to insure a full return stroke of the handle.

In the operation of the device, the handle 12 which is rotatably mounted on the shaft 10 and rigidly connected to the disk 23 is moved forward causing-the stud 28 on the disk 23 to engage the shoulder 29 on the disk 26 and move the same forwardly against the tension of the main spring 31. The forward rotation of the crank disk 26 will, through the connecting link 32 cause forward rotation of the ratchet disk 33 rotatably mounted on, the shaft 11. The-reaction of the spring 36 between the ratchet disk 33 and the crank disk 17 fixed on the shaft 11 will cause the crank dlsk 17 to rotate forwardly, carrying with it arm 19 and with it the main operating shaft 10. By means of this arrangement resilient means is interposed between the operating mechanism and each of the shafts 10 and 11. The pawl 37 will prevent thereturn of the parts until the disk 18 and consequently the shafts 10 and 11 have completed their forward movement. When the handle iszreleased the main spring 31 will return the parts to normal inoperative position. The momentum of the handle on its return movement will tend to continue to move rearwardly after the disk 26 has reached the rearward limit of its movement, and since the sleeve carrying the actuating handle is rigidly connected to the disk 23 this rearward movement of the actuating handle will place the spring 27 connected to the disks 23 and 26 under tension to check its further movement. In other words, the spring 27 will cushion the final rearward inovement of the actuating handle. The shoulder 30 will form a stop for engaging the stud 28. to positively limit the rearward movement of said handle.

As,shown, the two pawl arms 37, 38, are formed integral, and this integral pawl memberis pivotally supported upon a fixed stud 39. Furthermore, while the said pawl member is so constructed that it would operate as agravity pawl, its movement is preferably controlled by a spring 40, the arrangement being such that the spring operates to cause coaction of the pawl arm 37 with the ratchet disk 33 when the saidpawl arm is pointed in either direction.

I claim as my invention 1. The combination with an oscillating shaft of a calculating machine, of an oscillating handle, said shaft and handle each having a fixed range of movement, yielding driving connection between the handle and the shaft, and means including a single pawl and ratchet mechanism initially operative upon forward movement of the handle only to prevent reverse movement of the handle at any intermediate position during its forward movement and until forward movement of the shaft has been completed.

2. The combination with an oscillatin shaft of a calculating machine, of an oscillating handle on said shaft, a crank disk rotatably mounted von said shaft, positive driving connection between the handle and the crank disk, elastic driving connection between the crank disk and the shaft permitting the shaft to rotate more slowly than the disk, and means including a single pawl mechanism for holding the handle at any intermediate position duringits forward movement against reverse movement and until the shaft has completed a predetermined movement.

3. The combination with the shaft of a calculating machine, of an oscillating handle on said shaft, an operating shaft, two crank rotates the crank disks one fixed and the other rotatably mounted on said operating shaft, positive driving connection between the handle and said rotatably mounted crank disk, elastic driving connection between the disks, and means including a single pawl and ratchet mechanism for holding the rotatably mounted disk at any position in its forward movement against reverse movement and until the other disk has completed a predetermined movement, said means also preventing the return movement of said handle until it has completed a predetermined movement.

4. The combination with the operating shaft of a calculating machine, of an oscillating handle, a ratchet segment rotatably mounted on the shaft, anotherv segment fixed on the shaft, driving connection between the handle and the ratchet segment and between the two segments, the latter connection being elastic, and a holding pawl coa'cting with the ratchet segment but also riding on the other segment for preventing the reverse movement of said handle until said shaft has completed its forward movement. 7

5. In a calculating machine, a main shaft, a control shaft, means including a resilient connection for operating 'said main shaft through said control shaft, and means including a single pawl and ratchet mechanism for preventing reverse movement of said main shaft at any intermediate position of said control shaft and until said control shaft has completed its forward movement, and for preventing the return movement of said main shaft until it has completed its forward movement.

OLIVER D. JOHANTGEN. 

